Assume the random variable x is normally distributed with mean u=89 and standard deviation o=4. Find the indicated probability. ​P(x<8​7)

Answers

Answer 1

The random variable x is normally distributed with mean u=89 and standard deviation o=4. The indicated probability, ​P(x<8​7)= 0.3085.

Describe Standard Deviation?

In statistics, standard deviation is a measure of the amount of variation or dispersion in a set of data. It is a commonly used measure of the spread of a distribution and is calculated as the square root of the variance.

A higher standard deviation indicates that the data points are more spread out from the mean, while a lower standard deviation indicates that the data points are more tightly clustered around the mean.

Standard deviation is an important concept in statistics and is used in many statistical analyses, such as hypothesis testing and confidence interval estimation. It is also used in finance and economics to measure the risk associated with investments and to assess the variability of economic data.

To solve this problem, we need to standardize the value using z-score formula.

z = (x - mu) / sigma

Here, x = 87, mu = 89, and sigma = 4.

z = (87 - 89) / 4 = -0.5

We can look up the corresponding area under the standard normal distribution curve using a table or calculator. The area to the left of z = -0.5 is 0.3085.

Therefore, P(x < 87) = P(z < -0.5) = 0.3085.

To know more about probability visit:

https://brainly.com/question/1391304

#SPJ1


Related Questions

Claire has a bag of candy full of 5 strawberry chews and 15 cherry chews that she eats
one at a time. Which word or phrase describes the probability that she reaches in
without looking and pulls out a strawberry or a cherry chew?
O likely
O an equal chance or 50-59
O certain
O impossible

Answers

The phrase that describes the probability that Claire reaches in without looking and pulls out a strawberry or a cherry chew is "an equal chance" or "50-50 chance".

What is probability?

Chance is represented by probability. The study of the occurrence of random events is the subject of this mathematical subfield. The value is expressed as a number from 0 to 1. Mathematicians have begun to use the concept of probability to predict the likelihood of certain events.

This is because there are 5 strawberry chews and 15 cherry chews in the bag, so

the probability of drawing a strawberry chew is 5/20 or 1/4, and

the probability of drawing a cherry chew is 15/20 or 3/4.

Despite the fact that neither of the outcomes has the same probability, there are only two possible outcomes

Therefore, the probability of Claire drawing either a strawberry or a cherry chew is an equal chance or 50-50.

know more about probability visit :

https://brainly.com/question/11234923

#SPJ1

can you solve this quesiton?

Answers

Using chain rule, the derivative of the function is 1 / [4x^(3/4) (1 + x^(1/2))].

What is the derivative of the function?

Let u(x) = √4. Then we can write the given function as d/dx[tan^-1(u(x))].

Recall that the chain rule for differentiation states that d/dx[f(g(x))] = f'(g(x)) * g'(x). Applying this to our function, we have:

d/dx[tan^-1(u(x))] = [d/dx(tan^-1(u))] * [d/dx(u(x))]

To find d/dx(tan^-1(u)), we use the formula for the derivative of the inverse tangent function: d/dx[tan^-1(u)] = u'(x) / [1 + u(x)^2].

To find u'(x), we differentiate u(x) = sqrt4 with respect to x using the chain rule as follows:

d/dx[√4] = (1/2)x^(-3/4) * (d/dx)(x) = (1/2)x^(-3/4)

Therefore, u'(x) = (1/2)x^(-3/4).

Substituting u(x) and u'(x) into the formula for the derivative of the inverse tangent function, we get:

d/dx[tan^-1(u(x))] = [1 / (2x^(3/4) * (1 + x))]

Finally, substituting this expression for d/dx(tan^-1(u)) and d/dx(u(x)) back into our original chain rule expression from step 2, we get:

d/dx[tan^-1(√4)] = [1 / (2x^(3/4) * (1 + x))] * (1/4)x^(-3/4)

Simplifying the expression in step 6 by multiplying the two terms in the denominator and bringing x to the common denominator, we get:

d/dx[tan^-1(√4)] = 1 / [4x^(3/4) (1 + x^(1/2))]

Therefore, the derivative of the function d/dx[tan^-1(√4)] is 1 / [4x^(3/4) (1 + x^(1/2))].

Learn more on derivative of a function here;

https://brainly.com/question/12047216

#SPJ1

A souvenir shop sells t-shirts. The shop determines the price of each shirt by adding $3.75 to the price that it pays for the item. Then, that amount is doubled.
Before tax is added to the purchase, how much will a customer pay for a t-shirt that costs the souvenir shop $16.88? DUEE NOW PLS HELPP
Responses
A $20.63
B $36.95
C $45.35
D $41.26

The souvenir store pays $12.99 for a t-shirt. The store uses its usual price markup and adds $1.34 for sales tax., Which choice is the total amount a customer pays for the t-shirt?
Responses
A $34.82
B $23.71
C $28.40
D $14.33

Answers

Answer: D $41.26

Step-by-step explanation:

   We will follow the steps given in the question. If it costs the shop $16.88, we will add $3.75 and double it.

2(16.88 + 3.75) = $41.26

              D $41.26

Answer: A $34.82

Step-by-step explanation:

   First, we will follow the steps given in the question. If it costs the shop $12.99, we will add $3.75 and double it.

2(12.99 + 3.75) = $33.48

   Next, we will add the sales tax to this amount.

$33.48 + $1.34 = $34.82

              A $34.82

(3 1/2 hours) how many minutes?

Answers

Answer:

210 minutes

Step-by-step explanation:

We know that 1 hour = 60 minutes.

3 hours = 3 * 60 = 180 minutes

1/2 hour = 1/2 * 60 minutes = 30 minutes

3 1/2 hours = 180+30 = 210 minutes

Answer:

210 minutes

Step-by-step explanation:

To convert from hours to minutes, we can multiply by a conversion ratio:

[tex]\left(3 \dfrac{1}{2} \text{ hr}\right)\left(\dfrac{60 \text{ min}}{1 \text{ hr}}\right)[/tex]

↓ converting the mixed number to a fraction

[tex]\left(\dfrac{7}{2} \text{ hr}\right)\left(\dfrac{60 \text{ min}}{1 \text{ hr}}\right)[/tex]

↓ canceling the hours unit

[tex]\dfrac{7}{2} \cdot 60 \text{ min}[/tex]

↓ multiplying

[tex]\boxed{210\text{ min}}[/tex]

__

Note: When we multiply something by a conversion ratio, we are not changing the value of it, but rather changing its form. In other words, a conversion ratios has a value of 1, and anything multiplied by 1 is itself. To illustrate this:

[tex]\dfrac{60 \text{ min}}{1 \text{ hr}} = \dfrac{60 \text{ min}}{60\text{ min}} = \dfrac{1}{1} = 1[/tex]

because

[tex]1 \text{ hr} = 60 \text{ min}[/tex].

A coach randomly chose 20 football
players. Of the 20 players, 18 of
them also run track. Based on this
information, how many football
players do not run track if there are
110 players on the team?

Answers

Answer: 11

Step-by-step explanation: Based on the given conditions, formulate::

Calculate the sum or difference:

Simplify fraction(s): 11

A to City B. In 5 ​days, they have traveled 2,075 miles. At this​ rate, how long will it take them to travel from City A to City​ B?

Answers

In the question, we can draw the conclusion that, according to the formula, it will take them 10 days to get from City A to City B if they continue travelling at their current average speed of [tex]415 miles[/tex]per day.

What is formula?

A formula is a set of mathematical signs and figures that demonstrate how to solve a problem.

Formulas for calculating the volume of [tex]3D[/tex] objects and formulas for measuring the perimeter and area of [tex]2D[/tex] shapes are two examples.

A formula is a fact or a rule in mathematical symbols. In most cases, an equal sign connects two or more values. If you know the value of one, you can use a formula to calculate the value of another quantity.

We need to know the average pace at which they went to figure how long it would take to get from City A to City B at the same rate.

total distance / time taken = average speed

[tex]415 miles[/tex] per day [tex]2075/ 5[/tex], it would take them [tex]10[/tex] days to get from City A to City B because

Time taken = [tex]2075/415[/tex] per days [tex]= 5 days[/tex]

Therefore it will take them 10 days to get from City A to City B if they continue travelling at their current average speed of [tex]415 miles[/tex]per day.

Learn more about speed

https://brainly.com/question/28224010

#SPJ1

3. How many units are between the diamond
and the circle?

Answers

The distance between the diamond and the circle is approximately 5.83 units.

What is the distance between two points?

[tex]d = √((x_2 - x_1)^2 + (y_2 - y_1)^2)[/tex]

Where [tex](x_1,y_1) and (x_2,y_2)[/tex] are two co-ordinates.

Here we want to find the distance between the diamond and the circle.

We need to use the distance formula.

Here position of diamond is (2,3) and circle is (5,8)

Substituting the values into the formula, we get:

[tex]d = √((5 - 2)^2 + (8 - 3)^2) \\ = √(3^2 + 5^2) \\ = √34 \\ ≈ 5.83 units[/tex]

Therefore, the distance between the diamond and the circle is approximately 5.83 units.

Learn more about distance here,

https://brainly.com/question/26046491

#SPJ1

Correct question is "Position of a diamond in the point (2,3) and a circle in (5,8). How many units are between the diamond and the circle?"

The distance between the diamond and the circle is approximately 5.83 units.

What is the distance between two points?

Here we want to find the distance between the diamond and the circle.

Here position of diamond is (2,3) and circle is (5,8)

Substituting the values into the formula, we get:

d²= ([tex]x_{2} -x[/tex]₁)²+(y₂-y₁)²

Therefore, the distance between the diamond and the circle is approximately 5.83 units.

Learn more about distance here:

brainly.com/question/26046491

#SPJ1

Mila's math teacher said that each question answered correctly on a test would be worth 3 points. Answer the questions below regarding the relationship between the number of questions correct and the score on the test.

Answers

After answering the presented question, we can conclude that probability Therefore, the probability of 30 or more seconds between vehicle arrivals is approximately 0.0498.

What is probability?

Probability is a measure of how likely an event is to occur. It is represented by a number between 0 and 1, with 0 representing a rare event and 1 representing an inescapable event. Switching a fair coin and coin flips has a chance of 0.5 or 50% because there are two equally likely outcomes. (Heads or tails). Probabilistic theory is an area of mathematics that studies random events rather than their attributes. It is applied in many fields, including statistics, economics, science, and engineering.

Sketch of exponential probability distribution with mean of 12 seconds:

   |                            

   |                            

   |              .            

   |             . .            

   |             . .            

   |             . .            

   |             . . .          

   |             . . .          

   |             . . .          

   |             . . .          

   |             . . .          

   |             . . . .        

   |             . . . .        

   |             . . . .        

   |             . . . . .      

   |             . . . . .      

   |_____________. . . . . . .

        0       12             X

The X-axis represents the time between vehicle arrivals, and the Y-axis represents the probability density. The peak of the distribution is at 12 seconds, which is the mean.

b. Probability of the arrival time between vehicles being 12 seconds or less:

Since the mean of the exponential distribution is 12 seconds, we can use the cumulative distribution function (CDF) to find the probability of the arrival time being 12 seconds or less:

[tex]P(X < = 12) = 1 - e^(-12/12) = 1 - e^(-1) ≈ 0.6321[/tex]

Therefore, the probability of the arrival time between vehicles being 12 seconds or less is approximately 0.6321.

c. Probability of the arrival time between vehicles being 6 seconds or less:

[tex]P(X < = 6) = 1 - e^(-6/12) = 1 - e^(-0.5) ≈ 0.3935[/tex]

Therefore, the probability of the arrival time between vehicles being 6 seconds or less is approximately 0.3935.

d. Probability of 30 or more seconds between vehicle arrivals:

[tex]P(X > = 30) = e^(-30/12) ≈ 0.0498[/tex]

Therefore, the probability of 30 or more seconds between vehicle arrivals is approximately 0.0498.

To know more about probability visit:

https://brainly.com/question/11234923

#SPJ1

2 copies of 1/6 is _____???

Answers

1/6 + 1/6 = 2/6

2/6 simplifies to 1/3

Answer: 1/3

A rectangle has a width that is 6 inches less than its length. The perimeter of the rectangle is 72 inches. What is the length?

Answers

Let's call the rectangle's length x and its width, x - 6.

Since a rectangle has 4 sides and the perimeter of the rectangle

is just the distance around the outside of the figure,

we can create an equation.

This equation will be x + x + x - 6 + x - 6 = 72.

Simplifying on the left gives us 4x - 12 = 72.

Add 12 to both sides to get 4x = 84.

Now divide both sides by 4 to get x = 21.

Since x represents our length, we know that the length is 21 inches.

for #10: evaluate double integral by converting to polar coordinates:

Answers

The solutions to the equation:

8. The value of the integral is 0.

9. The value of the integral is approximately -0.336.

10. The value of the integral is π(b - a)/4

11. The value of the integral is π/4 - (1/2)(1 - e^4).

12. The value of the integral is -8π.

13. The value of the integral is π/64 + π/(32√2).

How did we get these values?

8. To evaluate the integral ∫∫R(2x-y) dA over the region R in the first quadrant enclosed by the circle x² + y² = 4 and the lines x= 0 and y=x, we can use polar coordinates.

First, we convert the equations of the circle and line into polar coordinates:

x² + y² = 4 becomes r² = 4

y = x becomes θ = π/4

The region R can be described in polar coordinates as 0 ≤ r ≤ 2 and 0 ≤ θ ≤ π/4. The differential element dA can be expressed in polar coordinates as dA = r dr dθ.

Now we can evaluate the integral:

∫∫R(2x-y) dA = ∫₀^(π/4) ∫₀² (2r²cosθ - rsinθ) r dr dθ

= ∫₀^(π/4) ∫₀² (2r³cosθ - r²sinθ) dr dθ

= ∫₀^(π/4) [r⁴cosθ/2 - r³sinθ/3]₀² dθ

= ∫₀^(π/4) 8cosθ/3 - 8sinθ/3 dθ

= [8/3(sinθ - cosθ)]₀^(π/4)

= 8/3(1/√2 - 1/√2 - (0 - 0))

= 0

Therefore, the value of the integral is 0.

9. To evaluate the integral ∫∫Rsin(x² + y²) dA over the region R in the first quadrant between the circles with center the origin and radii 1 and 3, we can again use polar coordinates.

In polar coordinates, the region R can be described as 1 ≤ r ≤ 3 and 0 ≤ θ ≤ π/2. The differential element dA can be expressed as dA = r dr dθ.

Now we can evaluate the integral:

∫∫Rsin(x² + y²) dA = ∫₀^(π/2) ∫₁³ r sin(r²) dr dθ

= ∫₀^(π/2) [-cos(r²)]₁³ dθ

= ∫₀^(π/2) cos(1) - cos(9) dθ

= sin(1) - sin(9)

≈ -0.336

Therefore, the value of the integral is approximately -0.336.

10. To evaluate the integral ∫∫R y²/x² + y²dA over the region that lies between the circles x² + y² = a² and x² + y² = b² with 0 < a < b, we can use polar coordinates.

In polar coordinates, the region R can be described as a ≤ r ≤ b and 0 ≤ θ ≤ 2π. The differential element dA can be expressed as dA = r dr dθ.

Now we can evaluate the integral:

∫∫R y²/x² + y²dA = ∫₀^(2π) ∫ₐᵇ (r⁴cos²θsin²θ)/(r⁴cos²θ) r dr dθ

= ∫₀^(2π) ∫ₐᵇ sin²θ cos²θ dr dθ

= ∫₀^(2π) [(b-a)/4](cos²θ - sin²θ) d

= ∫₀^(2π) [(b-a)/4](cos²θ - sin²θ) dθ

= [(b-a)/8] ∫₀^(2π) (1 - sin(2θ)) dθ

= [(b-a)/8] (2π - 0)

= π(b - a)/4

Therefore, the value of the integral is π(b - a)/4.

11. To evaluate the integral ∫∫D e^(-x²-y²) dA, where D is the region bounded by the semicircle x = √(4 - y²) and the y-axis, we can use polar coordinates.

In polar coordinates, the region D can be described as 0 ≤ r ≤ 2 and 0 ≤ θ ≤ π/2. The differential element dA can be expressed as dA = r dr dθ.

Now we can evaluate the integral:

∫∫D e^(-x²-y²) dA = ∫₀^(π/2) ∫₀² e^(-r²) r dr dθ

= ∫₀^(π/2) [-1/2 e^(-r²)]₀² dθ

= ∫₀^(π/2) (1/2 - 1/2e^4) dθ

= π/4 - (1/2)(1 - e^4)

Therefore, the value of the integral is π/4 - (1/2)(1 - e^4).

12. To evaluate the integral ∫∫D cos(√(x²+y²)) dA, where D is the disk with center at the origin and radius 2, we can again use polar coordinates.

In polar coordinates, the region D can be described as 0 ≤ r ≤ 2 and 0 ≤ θ ≤ 2π. The differential element dA can be expressed as dA = r dr dθ.

Now we can evaluate the integral:

∫∫D cos(√(x²+y²)) dA = ∫₀^(2π) ∫₀² r cos(r) dr dθ

= ∫₀^(2π) [2 sin(r) - 2r cos(r)]₀² dθ

= ∫₀^(2π) (-4) dθ

= -8π

Therefore, the value of the integral is -8π.

13. To evaluate the integral ∫∫R arctan(y/x) dA, where R = {(x,y) | 1 ≤ x² + y² ≤ 4, 0 ≤ y ≤ x}, we can use polar coordinates.

In polar coordinates, the region R can be described as π/4 ≤ θ ≤ π/2 and 1/√2 ≤ r ≤ 2. The differential element dA can be expressed as dA = r dr dθ.

Now we can evaluate the integral:

∫∫R arctan(y/x) dA = ∫π/4^(π/2) ∫1/√2² r arctan(tan(θ)) dr dθ

= ∫π/4^(π/2) [(r²θ/2 - r²tan(θ)/4)]1/√2² dθ

= ∫π/4^(π/2) [(2θ - π/2)/8] dθ

= [θ²/16 - (θ - π/4)/8]π/4^(π/2

= [π/16 - (π/4 - π/4√2)/8] - [(π/16 - (π/8 - π/8√2)/8)]

= π/64 + π/(32√2)

Therefore, the value of the integral is π/64 + π/(32√2).

learn more about value of the integral: https://brainly.com/question/28157330

#SPJ1

The question in text format:

8. ∫∫R(2x-y) dA, where R is the region in the first quadrant enclosed by the circle x² + y² = 4 and the lines x= 0 and y=x

9. ∫∫Rsin(x² + y²) dA, where R is the region in the first quadrant between the circles with center the origin and radii 1 and 3

Answer

10. ∫∫R y²/x² + y²dA, where R is the region that lies between the circles x² + y² = a² and x² + y² = b² with 0 < a < b

11. ∫∫D e⁻ˣ²⁻ʸ²dA, where D is the region bounded by the semi-circle x = √4 - y² and the y-axis

12. ∫∫D cos √x² + y² da, where D is the disk with center the origin and radius 2

13. ∫∫R arctan (y/x) dA, where R= {(x,y) | 1 ≤ x² + y² ≤ 4,0 ≤ y ≤ x}

Please Help I need an answer quickly!

Answers

Answer:

Hope this helps

Step-by-step explanation:

△ABC - Find the ratios and simplify them if necessary

[tex]\frac{8}{10} =\frac{4}{5}\\\\\frac{8}{6}= \frac{4}{3} \\\\\frac{10}{6}= \frac{5}{3}[/tex]

△DEF - Find the ratios (they can't be simplified)

[tex]\frac{4}{5}\\\\\frac{4}{3} \\\\\frac{5}{3}[/tex]

Find the area of the shaded region. Leave your answer in terms of a and in simplified radical
form.
120°
15 cm
The area of the shaded region is
(Simplify your answer. Use integers or fractions for any numbers in the expression. Type an exact answer in terms of x.)
50/1)
(1)
In

Answers

The area of the shaded region, we need to subtract the area of the smaller circle from the larger circle. Let's call the radius of the larger circle "r" and the radius of the smaller circle "a".

the area of the shaded region is 3πa^2.


The area of a circle is given by the formula

[tex]A = πr^2.[/tex]

Therefore, the area of the larger circle is πr^2 and the area of the smaller circle is πa^2.
To find the area of the shaded region, we need to subtract the area of the smaller circle from the larger circle:
Shaded area = [tex]πr^2 - πa^2[/tex]
However, we're not done yet because we need to simplify this expression in terms of "a" and in simplified radical form. To do this, we can factor out π from both terms:

Shaded area = π(r^2 - a^2)
We can simplify this expression further by noticing that [tex]r^2 - a^2 [/tex]is actually the difference of two squares, which can be factored as:
[tex]r^2 - a^2 = (r + a)(r - a)[/tex]
Therefore, the area of the shaded region is:
Shaded area = [tex]π(r + a)(r - a)[/tex]
And since we were asked to leave our answer in terms of "a" and in simplified radical form, we can substitute r = 2a (since the diameter of the larger circle is twice the radius of the smaller circle) and simplify:
Shaded area =[tex] π(2a + a)(2a - a) = π(3a)(a) = 3πa^2[/tex]

for such more questions on shaded region

https://brainly.com/question/14989383

#SPJ11

5 2/3 + 29/69+6 21/23 what is the sum

Answers

Answer:

To add mixed numbers, we first need to convert them to improper fractions. 5 2/3 = (5 x 3 + 2)/3 = 17/3 6 21/23 = (6 x 23 + 21)/23 = 139/23 Now we add the fractions together: 17/3 + 29/69 + 139/23 To add these fractions, we need to find a common denominator. The smallest common denominator for 3, 69, and 23 is 3 x 69 x 23 = 15087. So we rewrite each fraction with the common denominator: 17/3 x 5039/5039 = 85763/15087 29/69 x 219/219 = 633/15087 139/23 x 657/657 = 9123/15087

What is the volume, in cubic inches, of the right rectangular prism? the numbers are 3 3/4 5 4 1/2

Answers

according to the question the volume of the right rectangular prism is 67.5 cubic inches.

what is volume?

Volume is characterized as the space involved inside the limits of an article in three-layered space. The capacity of the object is another name for it.

A right rectangular prism's volume can be calculated by multiplying its lengths, width, and height. The prism's measurements are 3, 3/4, 5, & 4 1/2 inches.

First, we need to convert 4 1/2 to an improper fraction:

4 1/2 = (4 x 2 + 1)/2 = 9/2

Now, we can multiply the dimensions together to find the volume:

Volume = length x width x height

Volume = 3 x 3/4 x 5 x 9/2

Volume = 67.5 cubic inches

Hence, the bottom rectangular prism has a 67.5 cubic inch volume.

To know more about volume visit:

https://brainly.com/question/1578538

#SPJ9

Mr. White deposits $550 into a bank account earning an annual simple interest rate of 5%. How long will it take Mr. White to earn $165 in interest?

Answers

It will take Mr. White at least 3 years to earn $165 in interest at an annual simple interest rate of 5% on his $550 deposit.

To solve the given problem, we can use the formula for simple interest:

I = P × r × t

P = $550 is the initial deposit

r = 0.05 is the annual interest rate

I = $165 is the amount of interest earned

We can rearrange the formula to solve for t:

t = I ÷ (P × r)

Substituting in the values we know,

t = $165 × ($550 × 0.05)

t = 3 years

To learn more about interest follow the link: https://brainly.com/question/30393144

#SPJ1

Please help me with this question!!!!!!!!!!!!!!!!!!!!!

Answers

D because the points match up and the vertical line is the y axis

Rewrite the fractions 2/5 and 4/15 as fractions with a least common denominator

Answers

Answer:

Step-by-step explanation:

To rewrite the fractions 2/5 and 4/15 with a least common denominator, we need to find the least common multiple (LCM) of their denominators, which is 15.

For 2/5, we can multiply the numerator and denominator by 3 to get:

2/5 = (2 x 3)/(5 x 3) = 6/15

For 4/15, we don't need to do anything since its denominator is already 15.

Therefore, the equivalent fractions with a least common denominator are:

2/5 = 6/15

4/15 = 4/15

Answer: 2/5 and 133/100/15

Step-by-step explanation:

PLEASE HELPPP

Simplify (x^4y^8)^1/2

Answers

[tex]x^{2} y^{4}[/tex]

Question 3 A student solved a quadratic equation as shown here: 2x² + 5x = 12 (2x + 5) = 12 z = 12 or 2x+5 = 12 z = 12 or 2x+5-5=12-5 z = 12 or 2x = 7 x = 12 or x = 1 z = 1,12 Explain the errors in the process. Then correct the errors, and solve the equation.​

Answers

The process of solve of the quadratic equation is not correct. As the product of x and (2x+5) is equal to 12. Thus the value of x or 2x+5 never equals to 12. The solutions of the quadratic equation are 4, -3/2

What is an equation?

A mathematical equation is a formula that uses the equals sign to express the equality of two expressions.

The given quadratic equation is

2x² + 5x = 12

2(x² + (5/2)x) = 12

Divide both sides by 2:

x² + (5/2)x = 6

x² + 2 ×(5/4)x +  (5/4)² = 6 +  (5/4)²

(x + (5/4))² = 6 +  (25/16)

(x + (5/4))² = 121/16

x + (5/4)  = ± 11/4

x = 5/4 + 11/4 , 5/4 - 11/4

x = 4, -3/2

To learn more about solution of an equation, click on the below link:

https://brainly.com/question/16027692

#SPJ9

You are the student council member responsible for planning a school dinner dance. You will
need to choose a caterer, hire a band, analyze costs, and choose flowers for decoration. You
need to keep the ticket price as low as possible and still cover the costs.

Part 1 Choosing a Band

Band A charges a flat fee of $500 to play for the evening.
Band B charges $350 plus $1.50 per student.

Part A: Write a system of equations to represent the cost of the two bands.
Part B: Graph the system of equations and find the number of students for which the cost of
the bands would be equal.

Part 2: Choosing a Caterer

A caterer charges a fixed amount for preparing a dinner plus a rate per student served. The
total cost is modeled by the equation:
Total cost = fixed amount + rate * number of students
You know that the total cost for 50 students will be $450 and the total cost for 150 students
will be $1050. Find the caterer's fixed cost and the rate per student served. Explain your
answer.

Part 3: Analyzing cost

Use the information from Items 1 and 2. Assume that 100 students come to the dinner dance.
Decide which band you should choose and what the total cost per ticket should be to cover
the expenses of the band and caterer. Then repeat your calculations for 200 students.
Explain your reasoning.

Part 4: Choosing Flowers

You can spend no more than $500 on flowers for the event. A bouquet of daisies cost $25
each and a bouquet of roses cost $35 each.

Part A: Write and graph an inequality that represents the number of each type of flower that you can buy.

Part B: Suppose you buy 15 bouquets of daisies. What is the maximum number of bouquets
of roses you can afford? Explain.

Answers

A) System οf equatiοns:

Band A: Cοst = $500

Band B: Cοst = $350 + $1.5x, where x is the number οf students.

B) Graph:

Tο graph the system οf equatiοns, we can plοt twο pοints fοr each band. Fοr Band A, we οnly need οne pοint, since it has a flat fee οf $500 regardless οf the number οf students. Fοr Band B, we can chοοse twο values οf x tο find the cοrrespοnding cοsts:

Band A: (0, 500)

Band B: (0, 350) and (100, 500)

The graph is shοwn belοw:

Graph οf Band A and Band B cοsts

Tο find the number οf students fοr which the cοst οf the bands wοuld be equal, we can set the twο equatiοns equal tο each οther:

$500 = $350 + $1.5x

Sοlving fοr x, we get:

x = (500 - 350)/1.5 = 100

Therefοre, if the number οf students is 100, the cοst οf Band A and Band B wοuld be the same.

Part 2:

Let x be the number οf students served, y be the tοtal cοst, a be the fixed cοst, and r be the rate per student served. Then we have the fοllοwing system οf equatiοns:

a + 50r = 450

a + 150r = 1050

Subtracting the first equatiοn frοm the secοnd, we get:

100r = 600

Sοlving fοr r, we get:

r = 6

Substituting r intο the first equatiοn, we get:

a + 50(6) = 450

a = 150

Therefοre, the caterer's fixed cοst is $150 and the rate per student served is $6.

Part 3:

If 100 students cοme tο the dinner dance, the cοst οf Band A wοuld be $500 and the cοst οf Band B wοuld be:

$350 + $1.5(100) = $500

Therefοre, the cοst οf either band wοuld be the same, sο we can chοοse either οne. The tοtal cοst fοr the caterer wοuld be:

$150 + $6(100) = $750

Tο cοver the expenses οf the band and caterer, the tοtal cοst per ticket wοuld be:

($500 + $750)/100 = $12.50

If 200 students cοme tο the dinner dance, the cοst οf Band A wοuld still be $500, but the cοst οf Band B wοuld be:

$350 + $1.5(200) = $650

Therefοre, we shοuld chοοse Band A tο keep the ticket price as lοw as pοssible. The tοtal cοst fοr the caterer wοuld be:

$150 + $6(200) = $1350

Tο cοver the expenses οf the band and caterer, the tοtal cοst per ticket wοuld be:

($500 + $1350)/200 = $9.25

Part 4:

A) Inequality:

Let x be the number οf bοuquets οf daisies and y be the number οf bοuquets οf rοses. Then we have:

25x + 35y ≤ 500

This is because we cannοt spend mοre than $500 οn flοwers.

Tο graph this inequality, we can first graph the equatiοn:

25x + 35y = 500

This represents the bοundary line οf the inequality. We can find twο pοints οn the line by chοοsing twο values οf x:

When x = 0, y = 500/35 = 14.3 (apprοximately)

When x = 20, y = 0

To know more about equatiοns visit:

https://brainly.com/question/29657983

#SPJ1

nter your answer and show all the steps that you use to solve this problem in the space provided.

Answers

Answer:

Step-by-step explanation:

Given 4&7 = 21, 6&22=20, 8&30 = 26. Find 9&20​

Answers

Given4
Is given 21

So given 20 is given 9

please helppppppppppppppppppp

Answers

Answers are

AB = 14 units

BC = 11 units

CD = 14 units

AD = 11 units

Explanation

You can count the units from point to point to find length

Answer:

Step-by-step explanation:

You can solve this 2 ways:

1) just count the number of units from one point to the other

2) calculate it using the coordinates of the points and the distance between 2 points formula:  d = √(x2-x1)²+(y2-y1)²

A(-7, 6)     B(7, 6)     C(7, -5)     D(-7, -5)

AB = √(7--7)²+(6-6)² = √14² = 14

BC = √(7-7)²+(-5-6)² = √-11² = 11

CD = √(-7-7)²+(-5--5)² = √-14² = 14

AD = √(-7--7)²+(-5-6)² = √-11² = 11

Find the perimeter of a rectangle whose length is 29 centimeters and whose width is 12 centimeters less than its length. Question content area bottom Part 1 The perimeter of the rectangle is enter your response here ▼ ​(Simplify your​ answer.)

Answers

Answer:92 centimetres

Step-by-step explanation:

What is the value of {-4,6]?

Answers

The value of {-4,6} is -4.

The braces {} create a set.

The elements in a set are written inside the braces.

When a set contains only two elements, it is considered a set with two elements or a pair of elements.

In this case, the braces {-4,6} contain two elements: -4 and 6.

Thus, the value of this set is the union of these two elements, which in this case is the sum of the two elements: -4 + 6 = 2

(c) Some of the students were asked how much time they spent revising for the test. 10 students revised for 2.5 hours, 12 students revised for 3 hours and students revised for 4 hours. The mean time that these students spent revising was 3.1 hours. Find n. Show all your working.​

Answers

Answer:

N=8

Step-by-step explanation:

61 + 4n = 3.1n + 68.2

        .9n = 7.2

          n = 8

Consider the 1000 95% confidence intervals (CI) for that a statistical consultant will obtain for various clients.
Suppose the data sets on which the intervals are based are selected independently of one another.
How many of these 1000 intervals do you expect to capture the corresponding value of?
What is the probability that between 950 and 970 of these intervals contain the corresponding value of ? (Hint: Let Y = the number among the 1000 intervals that contain . What kind of random variable is Y?).
Note: use continuity correction.

Answers

Y follows a binomial distribution, where P(Y=1) is the likelihood that one interval includes.

the likelihood that between 950 and 970 of these intervals will contain the corresponding value

The likelihood that a parameter will fall between two values close to the mean is shown by a confidence interval1. Although there is a known likelihood of success2, there is no assurance that a particular confidence range does indeed capture the parameter. The population parameter is fixed, whereas the confidence interval is a random variable.

Let Y represent one of the 1000 intervals that contain the value. With parameters n=1000 and p=P(Y=1),

Y follows a binomial distribution, where P(Y=1) is the likelihood that one interval includes.

Using the normal approximation to the binomial distribution with continuity correction,

one can determine the likelihood that between 950 and 970 of these intervals will contain the corresponding value.

learn more about binomial distribution,

https://brainly.com/question/31197941

#SPJ1

What is 100x2x7x50x40x20x50
need help ASAP

Answers

Answer:

Step-by-step explanation:

2,800,000,000

2800000000 is the answer

It takes Oscar of an hour to get dressed and make his bed. It takes him another of an hour to eat breakfast and brush his teeth. How long does it take Oscar to get ready for school?

Answers

Answer:

Step-by-step explanation:

If it takes him one hour to get dressed and make his bed

then another to eat breakfast + brush his teeth

that's two hours total because

1hr+1hr=2hrs

Other Questions
Which statement best describes the 50% rule? A. Individuals should save and invest 50% of their income. B. Individuals should invest 50% of their savings in retirement accounts. C. Individuals should spend up to only 50% of their medium-term savings then build savings back up. D. Individuals should build back 50% of the spent savings after 10 years. HELP ME NOW PLEASE Explain why most of the farming in Africa takes place on only 10% of the continent. which of the following is not an example of substrate-level phosphorylation? a. 1, 3-bisphosphoglycerate -----> 3-phosphoglycerate b. isocitrate ----> alpha-ketoglutarate c. phosphenolpyruvate ----> pyruvate d. succinylcoa ----> succinate Can someone explain this which conditions support teamwork? (choose every correct answer.) multiple select question. work that is considered meaningful mutual accountability among team members working with ambiguous performance goals being accountable to a supervisor what is noun and the all types of noun How many different possible outcomes are there if you roll a four-sided die in the shape of a pyramid three times? what is the probability that in a random sample of 17 students from this group, the average height will be between 73 and 75 inches? help me pls5(x+2)-12=3x+4 How does Gallatin develop the idea that annexing Texas would result in war?A He argues war with Mexico is necessary to defend Congress' character. B He outlines the events that will occur if the treaty is violated.C He cites the military challenges of winning a war with Mexico.D He describes the provisions in the Mexico and Texas treaty.WILL GIVE BRAINLIEST! Write an equation for the quadratic graphed below what is the most likely consequence if you inhibit the ability of the protein ran to exchange gdp for gtp if you start with 0.373 m a(g), 0.396 m b(g), 0.552 m c(g), and 3.95 m d(g), what is the equilibrium concentration of c(g) and d(g)? You work for Kolb Aircraft Company. Kolb builds ultralight and experimental airplanes for flying enthusiasts. As a quality assurance manager, youve been invited to join a team that studies Federal Aviation Administration (FAA) safety regulations and applies them to the experimental airplanes Kolb sells. At the teams first meeting, you are asked to prepare a summary report of FAA safety standards. Now, at your second team meeting, you deliver your report to the group. After the presentation, several group members begin discussing the company barbecue they attended last Friday.Which team behavior does this situation describe? a)Contributing information and ideas b)Wasting the groups time c)Encouraging members to participate An economist wants to estimate the mean per capita income (in thousands of dollars) for a major city in california. he believes that the mean income is $21.2 , and the standard deviation is known to be $9.3 . how large of a sample would be required in order to estimate the mean per capita income at the 95% level of confidence with an error of at most $0.68 ? round your answer up to the next integer. . Helena wants to build a plant stand like the oneshown, and she wants to find its volume. Drawline(s) to show how she might divide the standinto two or more sections to make finding thevolume easier.Find the volume of each section you identified.Then find the total volume of the stand. Explain. X is a normal random variable with E[X] = -3 and V[X] = 4, compute a) ( 2.39) b) ( 2.39) c) (|| 2.39) d) (| + 3| 2.39) e) ( < 5) f) (|| < 5) g) With probability 0.33, variable X exceeds what value? the formation and convergence of the primate eye orbits is associated with: a) nocturnal vision. b) stereoscopic vision. c) increased olfaction. d) loss of a tail in all anthropoid complete the diagram 4 62______ -3 why should break even analysis and cost plus pricing not be the driving force behind pricing strategy